Super Bowl XLVII averaged 108.4 million viewers Sunday, making it only the third most-watched and ending a streak of record-setting games, according to Nielsen estimates.

The Baltimore Ravens' defeat of the San Francisco 49ers, interrupted by a half-hour power outage that is excluded from ratings averages, fell about 3 million shy of last year's game (111.3 million; 2011's championship game drew 111 million. Sunday's game reached its audience peak in its final minutes, after the score had tightened, when an average 113.9 million tuned in.

Thanks to the power outage at the New Orleans Superdome, which delayed play and extended the game, a special episode of Elementary, which followed the game, was the latest-starting post-Super Bowl show ever. It began at 11:11 p.m. ET, after prime time had ended.

The episode drew a series-high 20.8 million viewers but marked the second-worst showing for a postgame series. That record is still held by a 2003 episode of ABC's Alias, which started at 11:01 ET and averaged 17.4 million viewers. Historical high points were a 1996 Friends outing on NBC, netting 52.9 million fans, and CBS' second-season premiere of Survivor in 2001, which drew 45.4 million.

Similar reality series with broad appeal have historically been among the most popular postgame fare: CBS struck pay dirt with its last Super Bowl in 2010, winning 38.7 million viewers for the premiere of Undercover Boss, and last year NBC nabbed 37.6 million with an episode of The Voice. Both shows also were among the earliest starting postgame series, about 10:15 ET. But Sunday's game didn't end until 10:45 and was followed by the traditional postgame wrap-up, which lasted about 25 minutes.